Tid og sted: 22. jan. 2018 10:30 - 26. jan. 2018 16:00, Seminar room "Gates of Eden" (2nd floor), Matematisk Institutt, Sognsveien 77B, Ullevål Stadion

The winter school, which takes place in Oslo from 22.-26. January 2018 and which is supported by the Norwegian Centre for International Cooperation in Education in connection with a Norwegian-Ukrainian cooperation in mathematical education, brings together students and researchers from Ukraine (National Technical University of Ukraine, "Igor Sikorski Kyiv Polytechnic Institute", Vasyl' Stus Donetsk National University, Vinnitsa and Uzhgorod National University, Uzhgorod) and Norway (University of Oslo).

The talks and mini-courses given at the winter school, which is attended by 40 invited participants, pertain to topics in stochastic analysis, probability theory and related fields.

Further, presentations are also devoted to the issue of training and preparation of students for mathematical olympiads and other international competitions in mathematics.

Tid og sted: 24. jan. 2018 11:15 - 12:00, Seminar room "End of the Line" (2nd floor), Matematisk Institutt, Sognsveien 77B, Ullevål Stadion
Tid og sted: 25. jan. 2018 10:15 - 12:00, Ole Johan Dahls hus
Tid og sted: 18. juni 2018 - 22. juni 2018, Sophus Lie Conference Center, Nordfjordeid, Norway.

Nordfjordeid Summer school 2018

Tid og sted: 6. des. 2018 11:00 - 8. des. 2018 15:00, University of Oslo

A conference in algebraic geometry on the occasion of Geir Ellingsrud’s 70th birthday


Tid og sted: 19. jan. 2018 13:15, "Hurricane", Ullevål stadion, Sognsveien 77 B.


Computational Analysis of a Drag reducing Cone Grid

A finite volume simulation of the gecko's aerodynamic skin

Tid og sted: 15. jan. 2018 11:00, Møterom "End of the Line", Ullevål stadion, Sognsveien 77 B


Tid og sted: 12. jan. 2018 14:00, "Hurricane", Ullevål stadion, Sognsveien 77 B.


B-splines in machine learning

Tid og sted: 12. jan. 2018 12:00, End of the Line, Ullevål, Sognsveien 77 B.


Cohomology of Projective Systems on Ranked Posets


Tid og sted: 11. jan. 2018 15:00 - 17:00, PRIO, Hausmannsgate 3, Oslo

This seminar is a part of the UiO-PRIO collaborative effort Oslo Lectures on Peace and Conflict

Tid og sted: 11. jan. 2018 10:00, "End of the Line", Sognsveien 77 B, Ullevål stadion


Modeling the Premium in Non-Life Insurance 

A Comparison of Generalized Linear and Generalized Linear Mixed Models

Tid og sted: 9. jan. 2018 13:15 - 14:00, Ullevål End of the Line

Emerging instabilities and bifurcations from deformable fluid interfaces in the inertialess regime 

In this talk, I will present two studies regarding the dynamics of droplets in the creeping flow, focusing on the arising instability and bifurcation phenomena. The first work investigates a buoyancy-driven droplet translating in a quiescent environment and the second a particle-encapsulating droplet in shear flow. There-dimensional simulations based on versatile boundary integral methods were employed to explore the intriguing instability and bifurcation phenomena in the inertialess flow. In the first work, a non-modal stability analysis was performed to predict the critical condition of instability; and in the second, a dynamic system approach was adopted to model and characterize the interacting bifurcations.

Tid og sted: 9. jan. 2018 11:00 - 12:00, Gates of Eden

Elizabeth Gillaspy from the University of Montana at Missoula, USA, will give a talk with title " Finite decomposition rank and strong quasidiagonality for virtually nilpotent groups "

Abstract: In joint work with Caleb Eckhardt and Paul McKenney, we show that the C*-algebras of discrete, finitely generated, virtually nilpotent groups G are strongly quasidiagonal and have finite decomposition rank. Thus, the only remaining step required to show that primitive quotients of such virtually nilpotent groups G are classified by their Elliott invariant is to check that these C*-algebras satisfy the UCT. Our proof of finite decomposition rank relies on a careful analysis of the relationship between primitive ideals of C*(G) and those of C*(N), where N is a finite-index normal subgroup of G. In the case when N is also nilpotent, we obtain a decomposition of C*(G) as a continuous field of twisted crossed products, which enables us to prove finite decomposition rank of C*(G) by analyzing the decomposition rank of the fibers.  

Tid og sted: 20. des. 2017 13:00, Rom 3118 (Awk)


The effect of tissue motion on multibeam Iterative Adaptive Approach  beamforming in medical ultrasound imaging


Tid og sted: 20. des. 2017 10:15, Rom "Hurricane" på Ullevål, Sognsveien 77 B


Representations of Cuntz–Krieger Algebras and Wavelets on Fractals


Tid og sted: 19. des. 2017 14:00 - 15:00, Desolation row, Ullevål

Antoine Julien, Universitetet i Nord, will give a talk with title:  Rieffel-type projections in higher-dimensional rotation algebras

Abstract: Rieffel first built a non-trivial projection in the rotation algebra by considering a certain C*-module over this algebra, and exploiting the Morita equivalence which it implements. In this talk, I will present how it is possible to extend these ideas to construct explicitly projections in higher-dimensional noncommutative tori. Precisely, our techniques can be applied to the NC tori which are associated with an R^d-flow on a 2d-torus, or equivalently which are given by the crossed product of C(T^d) by Z^d. I will also hint on how this result can be interpreted as constructing Gabor atoms associated with some lattices in the time-frequency space R^{2d}. This is a joint work with Franz Luef (NTNU).

Tid og sted: 15. des. 2017 13:00, Rom "Hurricane", Ullevål, Sognsveien 77 B


The Cone Conjecture for Some Calabi-Yau Varieties


Tid og sted: 13. des. 2017 13:15, Ullevål Stadion: Gates of Eden

M.Sc. Hannes Hagen Haferkorn ved Matematisk institutt vil forsvare sin avhandling for graden ph.d.:

The effect of noise in the modelling and the analysis of random systems


Tid og sted: 13. des. 2017 11:00 - 12:00, Desolation Row, Sognsv. 77B

Abstract: Recently, Steve Kaliszewski, Tron Omland, and I have been investigating the following theorem of Pedersen: two actions of a compact abelian group on C*-algebras A and B are outer conjugate if and only if there is an equivariant isomorphism between the crossed products that respects the positions of A and B. We upgraded this to nonabelian groups (using coactions on the crossed products), and then searched for examples showing that the last condition (on the positions of A and B) is necessary. We failed. This lead us to formulate the "Pedersen Rigidity Problem": if the crossed products of A and B are equivariantly isomorphic, are the actions on A and B outer conjugate? We have been finding numerous "no-go theorems", which give various sufficient conditions for Pedersen Rigidity. Quite recently we have done this for ergodic actions of a compact group, assuming that the actions have "full spectrum". In fact, these actions are (not just outer) conjugate if and only if the dual coactions are. I will summarize our progress on the Pedersen Rigidity Problem and outline the proof of the no-go theorem for these compact ergodic full-spectrum actions.

Tid og sted: 13. des. 2017 10:15, Gates of Eden, Ullevål stadion

M.Sc. Hannes Hagen Haferkorn ved Matematisk institutt avholder prøveforelesning over oppgitt emne: "Harmonic functions, Brownian motion and martingales".

Tid og sted: 12. des. 2017 13:00, Rom "End of the Line", Sognsveien 77 B.


Transfinite surface interpolation over irregular n-sided domains


Tid og sted: 12. des. 2017 09:00, Fysikkbygningen: Kristian Birkelands auditorium


Time Evolution of Quantum Mechanical Many-Body Systems


Tid og sted: 11. des. 2017 13:30, Rom "End of the Line" på Ullevål, Sognsveien 77 B.


Fiducial and Objective Bayesian Inference


Tid og sted: 11. des. 2017 10:00, Rom "End of the Line" på Ullevål, Sognsveien 77 B.


Topics in Condence Distributions

Tid og sted: 7. des. 2017 10:30, Rom "Desolation Row", Ullevål, Sognsveien 77 B


American Options in Financial Quotes